October 4, 1918. THE COLLIERY GUARDIAN. 697 Sections of our Patent Roller Conveyor. •olco Our Patent Roller Jigging Conveyors are unequalled for efficiency, construction, durability and increasing output. It is the best labour-saving plant introduced into a mine. No. 4 Conveyor will deal with 500 tons per shift. XI L-W -7 PATENT COMPRESSED AIR-DRIVEN MOTOR. Made in sizes to suit all requirements. MOTOR ARRANGED ALONGSIDE CONVEYOR. Telegrams: “Conveyor, Sheffield.” Telephone: 2401 Central. 32,CHURCH ST.. SHEFFIELD.